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Auditory brain stem response wave V latency-intensity function and three audiologic measures of cochlear function.

C M Suter, C C Brewer

    Ear and Hearing
    |July 1, 1983
    PubMed
    Summary
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    The auditory brainstem response (ABR) wave V latency-intensity function shows promise in identifying sensory hearing loss. Its slope and intensity patterns effectively differentiate cochlear from retrocochlear impairments.

    Area of Science:

    • Audiology
    • Neuroscience
    • Hearing Science

    Background:

    • Sensory hearing losses require accurate diagnostic tools.
    • Differentiating cochlear from retrocochlear impairments is crucial for effective treatment.
    • Existing audiological tests have varying sensitivities in identifying specific hearing loss types.

    Purpose of the Study:

    • To compare the sensitivity of the auditory brainstem response (ABR) wave V latency-intensity (L-I) function with other audiological tests.
    • To evaluate the effectiveness of these tests in identifying sensory hearing losses.
    • To determine the ability of each test to distinguish between cochlear and retrocochlear impairments.

    Main Methods:

    • Tested five audiometric groups: normal hearing, conductive, high-frequency sensory, flat sensory, and retrocochlear hearing losses.

    Related Experiment Videos

  • Administered Alternate Binaural Loudness Balance, Loudness Discomfort Level, Acoustic Reflex Threshold, and ABR wave V L-I function tests.
  • Analyzed the sensitivity of each test in identifying sensory hearing losses and differentiating retrocochlear impairments.

    • Main Results:

    • The ABR wave V L-I function demonstrated significant potential in identifying sensory hearing losses.
    • A combination of the wave V L-I slope at lower intensities and the intensity value separating steep and shallow slopes proved effective.
    • This combined ABR measure showed promise as a positive discriminator for cochlear impairments.

    Conclusions:

    • The ABR wave V L-I function is a sensitive tool for identifying sensory hearing loss.
    • Specific parameters of the ABR L-I function can effectively differentiate cochlear from retrocochlear hearing impairments.
    • This approach offers a valuable method for diagnosing hearing loss types.